CPAN::Groonga

use strict;
use warnings;
use Test::More;

use_ok 'Data::Object::Hash';
# deprecated
# can_ok 'Data::Object::Hash', 'reverse';

use Scalar::Util 'refaddr';

subtest 'test the reverse method' => sub {
  my $hash = Data::Object::Hash->new({1 .. 8, 9, undef});

  my @argument = ();
  my $reverse  = $hash->reverse(@argument);

  isnt refaddr($hash), refaddr($reverse);
  is_deeply $reverse, {8 => 7, 6 => 5, 4 => 3, 2 => 1};

  isa_ok $hash,    'Data::Object::Hash';
  isa_ok $reverse, 'Data::Object::Hash';
};

ok 1 and done_testing;